Hello. I have a problem with the car. The patient is a Mazda 323f ba 1.5 petrol + LPG 1994. The problem is the undulating speed and the fact that he chokes terribly, which means he has a lack of power and does not want to drive. The turnover can drop even so that it goes out ? Has anyone had such a problem? I am asking for quick help what may be wrong with her. Thank you in advance and best regards.